x-78=87+12

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Solution for x-78=87+12 equation: 



x-78=87+12

We move all terms to the left:

x-78-(87+12)=0

We add all the numbers together, and all the variables

x-78-99=0

We add all the numbers together, and all the variables

x-177=0

We move all terms containing x to the left, all other terms to the right

x=177

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